Sipping on an excellent SB of Jack recently, I was reminded that this whiskey is a notably woody one. All iterations I've had have that top-note. Michael Jackson noted the characteristic, referring also to earthy notes, in his 1987 World Guide To Whiskey and other books I've read.
Why is this? Jack carries no age statement and from all reports is not more than 4-5 years old.
Why would it acquire this characteristic at a relatively young age?
Can it be that the aging atmosphere in Tennessee is different than Kentucky and imparts this quality? I don't think so since too Dickel doesn't seem unusually woody.
I think perhaps the reason is, the whiskey is relatively "lean" due to the preliminary charcoal filtering. This (I infer) strips out a lot of the oils and higher alcohols that give body to bourbon and would balance off the wood character gained after 4-5 years. Yet, Dickel must lose the same elements and doesn't again seem that woody.